Top 60 ReactJS Developers in Warsaw

A client management company engaged Yellow to complete an unfinished app and develop a client-collaboration portal. Building on a previous vendor's work, Yellow completed the app using Ruby on Rails, adding a login portal, cybersecurity measures, and other new features. Since then, the app has received unanimous praise for its simplicity and user-friendly functions.

"Yellow stands out because they’re invested in the results and clients. " – Co-Founder, Client Management Platform

Brainhub provided frontend development using Electron and React for a gaming company. They worked with an internal team to build a desktop application of a game launcher and distribution platform.

"I appreciate that they don’t necessarily always follow the adage of the customer always being right...This has led to quite a few significant improvements to features that otherwise would have been subpar or not functional at all if they had not spoken up. In the same vein, they are also respectful when we acknowledge their concerns, but we insist on going in a certain direction" – Technical Director, Gaming Company

Neoteric established a paperless workflow for an automotive company by developing a microservices application. The application has several modules and includes functions that allow customers to choose parts; help contractors and warehousing facilities; process payments; send and share documents; trigger the company's system to send emails; and manage customers' overall interactions with the company. The app has caused revenue to grow exponentially. 

"Now that I've worked with Neoteric, I understand what was wrong with previous vendors." – CEO, Automotive Company 

Startup Development House developed the platform for a ship technology startup to attract clients. They used Ruby on Rails and PostgreSQL to develop a user-friendly platform that easily handled all the client data.

"Currently, we have a lot of shipyards using the site and they like it. We have also been contacted by shipyards without us having to reach out to them. We have received a lot of positive feedback, and people are happy that there is finally a platform that is easy to use." — CEO, Ship Tech Startup

A healthcare professional development startup hired FireArt Studio to create an online tool for healthcare professionals. FireArt Studio designed and coded the front end using Javascript and created custom illustrations for the UI.

"They came up with an attractive design with minimal direction and inspiration from our team. They were also quite helpful, pointing out some usability issues that we were able to fix before our users encountered them." — CTO, Healthcare Startup

United Ideas recently worked on software development for a cosmetics company. They created a web application and promotional code generator, among other things, for that client.

“Their communication was great. That was one of the things that I liked working with them in general. The involved team was always available, so I could always ask questions. They were still entirely consistent with whoever was on the project, meaning no turnover in resources.” - Digital Manager, Cosmetics Company

SYZYGY Warsaw provided a Tourism Company with e-commerce development services, which includes transitioning the client from Angular to React, frontend design and development, and collaborating with a third-party backend team. The client has seen an increase in online sales since they began working with SYZYGY.

"They bring useful technology to the project. My team has good relations with their team." - Head of E-Commerce, Tourism Company

Visuality developed a team management application for a technology firm that wanted to market the platform to home service businesses. The client had a negative experience with a larger developer, and wanted to return to a smaller firm to launch their product. Using Ruby on Rails and ReactJS, Visuality developed a custom scheduling and organization suite with personalized options for users.

"Despite the distance between our two companies, they felt like friends and family for us. They take tremendous pride in their work and really seemed to care about our project." — Project Manager, Management Software Firm

Order Group developed a navigation app based on pre-existing wireframes and documentation for an IT and services company. They built the native apps for iOS and for Windows devices. The end-client was impressed with their work and renewed their purchase for another year.

“Order Group provided extensive documentation of their resource allotment and effectively managed sprint timelines. They used their development knowledge to collaborate on and improve requirements, which led to high-quality deliverables.” – IT & Services Company

codequest redeveloped an iOS application for a property search engine in Sweden. Their team took over the development role after the internal team left. They used the client’s API’s and server infrastructure to deliver a more functional application with additional updated and UX/UI strategies. The client appreciated codequest’s technical competence and timely delivery

“The work-related metrics have been solid. They’ve been very timely with their development releases and communications. They’ve been consistent in delivering what we’ve agreed upon on time.” — Manager, Real Estate Site

GoApps recently worked on mobile app development for a vehicle imaging software company. They added an acceptance and rejection function to the mobile app   for that client.

“Their uptime is really great. The speed of use has improved as GoApps releases newer versions. ” — Owner, Vehicle Imaging Software Company

A hygiene products company worked with Intent to create their mobile app. The client was most impressed with the project management skills of the team.

“They [Intent] were proactive, responsive to our needs, and agile. They were doing everything that was required to meet the deadlines. Even if we had unforeseen issues to fix during testing, they were able to meet the deadlines 90% of the time.” – Senior IT Manager, Hygiene Products Company

NG Logic was hired by a software vendor to build a network-managed control agent to support dynamic workload routing across various servers. 

"NG Logic managed the development relationship professionally. They sought direction and clarified requirements before making design and implementation decisions independently." – CTO, Software Vendor 

A construction company hired Asper Brothers to build a project management app to streamline workflow. Asper Brothers built a custom solution with PHP and Vue.js, which allowed workers at construction sites to use the app. The app helped decrease operating costs and the number of project errors.

"Our efficiency increased significantly once the app was launched. Our site engineers now spend less time on minor tasts, lower-level employees at construction sites know what they need to do at every stage of the project, we don't lost documents, and our workflow has improved." – Supervisor, Construction Company

The Story redesigned the user interface of a company website to reflect new services. The new website is optimized using AWS and available worldwide.

App'n'roll took over and completed the development of a user behavior testing platform. They used Ruby on Rails for development and completed the project within 2 days for the healthcare firm that hired them. Their communication and quality of work stood out. 

"The quality of their code, speed, and ability to work independently were all great. They work fast and are self-starters. They will suggest necessary changes by themselves and are responsive to business needs. They were very smart and made modern improvements of existing codebase and design, which we appreciated." – Technology Consultant, Health Care Platform

A healthcare company was building an online tool to facilitate more efficient collaboration between doctors, but Safari didn't support the features they were looking to implement. After deciding to build an iOS app, they hired Future Mind to develop the app and include screen- and video-sharing capabilities, integrated the app with the existing healthcare system, and managed the testing process.

"The workmanship was excellent, as were their depth of knowledge and professionalism. Future Mind came in, gave us tons of change recommendations for certain areas, did the work, wrote the tests, and hit deadlines. Everything went well with this project." — Senior Software Engineer, Healthcare Company

Ulam Labs built a crytocurrency trading platform from scratch. They complemented the client's design work with frontend and backend development and DevOps for the platform using Python, Docker, and Kubernetes. The client was most impressed with the quality of the code. 

"The quality of code is excellent." – CEO, Cryptocurrency Trading Platform

Proexe worked with a software development firm to rebuild their website and create a related mobile app. The client was impressed with the finished website and their communication throughout the process.

“Other companies I've worked with on web development for 10 years would only check in every 2-3 weeks. In these cases, the customer usually has a communication blackout until certain milestones are reached. Proexe, however, always keeps you updated. They tell you exactly where they are in specific project stages.” – General Manager, Software Company

LeanCode developed a mobile app for a workplace fitness SaaS. The goal was to develop an app that was to be used by clients such as Google and Microsoft. LeanCode’s contributions to the app made it have a 4.4 rating.

“LeanCode taught us how to build a great product effectively.” - CEO, Workplace Fitness SaaS

InterSynergy updated a quiz game web app and built an additional web app optimized for mobile devices. They used AngularJS and WebSocker technologu. Their work reduced defects in the original app, while the mobile version allows players to get the game on the go. The team worked hard and communicated well. They’re a reliable partner.

“Their primary responsibility was development according to our assigned specifications, but they assisted several times to improve UX issues and conceptually contribute to new features.” – CEO, Quiz Game Platform

Da Vinci Studio developed an enrollment website for a sports training program, including software for individual coaches and soccer clubs. They also created mobile apps and tools for evaluating player skill levels. Da Vinci Studio’s software receives great reviews from its users.

“Overall, the collaboration with Da Vinci Studio has been positive and we’re happy about how our products look. Right now, everyone using our software appreciates it and we haven’t received any bug reports.” – Project Manager, Soccer Training Program

JMR Technologies developed a mobile fitness game. They used Unity to build out the backend, then they integrated GPS tracking, and allowed users to sign up through social media accounts.

"Our developer has managed the whole project and done a great job." Executive Sports Company

HYPE4 worked with an investment platform to create an e-commerce site for individual investors. They designed and coded the frontend of the software as well as the custom charts library. The client was impressed by their work ethic and their flexibility. 

"HYPE4 has impressed us with their flexibility. They provide good value for money and quick response to changes in the project. We’ve found that they are truly a result-driven partner." - Marketing Director, Investment Platform

Silk Software House developed an internal communication and knowledge-sharing platform that enables employees to sign up for workshops and trainings. The team exceeded the client's expectations. 

"they're patient and able to work with people who don't have an IT background." – Brand Reputation Director, Communications Group

Develtio developed an automated customer service chatbot that responded to customer support tickets for a financial services company. Develtio worked effectively through the development process, giving the chatbot natural language learning capabilities. The chatbot significantly reduced processing time for customer support and left customers satisfied, helping to modernize the brand.

“We’ve automated most of the questions asked on Messenger and manage to speed up our reaction time to customer queries from few minutes to instant. It helped us boost satisfaction and build an image of a modern institution.” – Head of Social Media, Financial Services Company

Sparkbit worked with a mobile app agency to provide backend development. The backend work has successfully been used by over 80,000 users. 

"The main thing to note about Sparkbit is the team's flexibility. They are able to cover any kind of task we provide." – Mobile Strategist, Mobile App Agency

Codest developed the frontend and backend of a web-based tool for booking targeted online ads for a media company. The client found value in their nuanced understanding of industry needs, fluid communication, and high reliability. They enhanced the product using Ruby on Rails and JavaScript, and it has dramatically increased revenue and contributed to business growth.

“Codest’s work has had a positive effect on our income. The platform makes it easier for our team to sell ads, which has resulted in increased business. It’s also being used by external customers, making it one of our most important products.” – Head of Development, Media Company

ITprofit provided UX/UI, development, and marketing solutions for a real estate platform. The platform wanted their portal to be the biggest in all of Belarus. ITprofit’s work was efficiently carried out, and the portal has since become the platform’s main focus.

“Project management and communication were organized at a high level, and the work was carried out efficiently.” - Co-Founder, Real Estate Platform

TeaCode.io partnered with an education resource company to redesign their backend of the app for interactive digital books. They provided the redesign and developed a stronger backend of the app to handle the growth of books. The number of app users increased exponentially since the collaboration.

”Before our engagement, the platform would go down quite a bit. Now, the only time our product goes down is when the hosting people have problems. TeaCode.io improved our reliability, security, and speed.” – Tech Lead, Educational Resource Company